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  • Title: A rare case of chronic lymphocytic leukemia with hypercalcemia induced by elevated parathyroid hormone-related peptides.
    Author: Kampfenkel T, Baraniskin A, Teschendorf C, Schmiegel W, Massenkeil G.
    Journal: Acta Haematol; 2010; 124(1):57-60. PubMed ID: 20616540.
    Abstract:
    Hypercalcemia in malignancies is a frequent complication, mostly affecting patients with solid tumors or multiple myeloma. Calcium elevation is induced by direct bone infiltration of a tumor mass or through calcium liberation from the skeleton by a humoral mediator. The latter mechanism is referred to as humoral hypercalcemia of malignancy (HHM). Frequent mediators of HHM are parathyroid hormone-related peptides (PTHrP). We report a patient with chronic lymphocytic leukemia and hypercalcemia induced by PTHrP. In contrast to solid tumors and myeloma, PTHrP-induced HHM is very rare in low-grad lymphoma including chronic lymphocytic leukemia. Therapeutical approaches consist of cytoreductive treatment and calcium-lowering therapy with bisphosphonates.
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